基于GIS的城市公园可达性分析

Accessibility Research of Urban Park Based on GIS

研究以城市公园分类图、道路图和水系图为基础数据资料,在遥感(RS)和地理信息系统(GIS)技术支持下,运用空间可达性的概念与原理,采用费用加权距离方法,对南昌市的公园绿地空间分布特征、可达性及其原因进行分析,生成公园可达性的时间等值圈图,通过对生成图表的分析得知:南昌市公园绿地分布不均衡,不太合理;公园可达性较好,存在一定的差异,昌北可达性优于昌南;居民需驾车前去的公园少。城市绿地可达性分析是衡量城市绿地服务功能社会公平性的有力手段,因此,它将丰富我国城市绿地评价的核心指标体系,亦可为城市规划者和建设者合理规划与布局城市绿地提供科学的依据和参考。

An urban park space map,a road network map and a watershed map were used as the basic landscape data. Under the support of re- mote sensing （RS） and geographic information system （GIS） ,based on the concept and principle of landscape accessibility ,using a cost weighted distance analysis method,the space distribution characteristics, accessibility and causes of park greenland in Nanchang were analyzed. Time equiv- alent graphs of the park accessibility were generated. The analysis if the generated diagrams showed that the park green space distribution of Nan- chang was not balanced and unreasonable. Park accessibility was well ,with some difference. The accessibility in north of Nanchang was better than that in the south of Nanehang. The few parks needed residents to drive to. The accessibility analysis of urban green space was an important ways to weight the social equity of the service function of urban green space. Therefore, accessibility analysis of urban park will enrich the core index system of urban green space evaluation in China and provide a scientific basis and reference for the reasonable planning and layout of urban green space for urban planners and builders.